Complete the following graph by labeling each bar (a-e) with a cause of extinction, from the most influential to the least influential. а. b. C. d. е. O 20 40 60 80 100 % Species Affected by Threat
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- Environments with low frequency and intensity of disturbance tend to have ________ species diversity because ______. Group of answer choices A) low; the best competitors exclude any other species B) high; disturbances kill off a large number of individuals C) low; there are fewer late-successional species than early-successional species D) high; more species can colonize over a longer period of time Question: Answer choice selection is either: Burkina Faso or Italy for all three answer choicesChoose one anthropogenic causes of extinction and provide possible solution/s on how to prevent it.List five factors that can determine whether an equilibrium population is in danger of extinction.
- Which of the following strategies would most rapidly increasethe genetic diversity of a population in an extinction vortex?(A) Establish a reserve that protects the population’s habitat.(B) Introduce new individuals transported from other populations of the same species.(C) Sterilize the least fit individuals in the population.(D) Control populations of the endangered population’spredators and competitors.How much faster is species extinction occurring today versus the natural rate? Group of answer choices 1. The same as the natural rate B. 100 times the natural rate C. 10 times the natural rate D. 1,000 times the natural rateThe island equilibrium model predicts that a small island will be able to support _____ species than a large island because the rate of _____ will be higher due to _____. A. More; extinction; easier dispersal B. More; immigration; easier dispersal C. Fewer; immigration; reduced dispersal D. Fewer; extinction; increased competition E. Fewer; immigration; harder dispersal
- Which of the following is not true of a population of largepredators in a small reserve?a. The species may disappear from the reserve.b. The species will probably undergo a populationexplosion.c. The species will probably lose genetic diversity.d. The species may overeat its prey, causing a reduction inprey population.Identify any five factors that can lead to species extinction irrespective of regime (open access versus private property) under which the renewable source is managed. What are some of the policy instruments for managing fisheries?One characteristic that distinguishes a populationin an extinction vortex from most otherpopulations is that(A) it is a rare, top-level predator.(B) its effective population size is lower than itstotal population size.(C) its genetic diversity is very low.(D) it is not well adapted to edge conditions.
- The principle of competitve exclusion states thata) Competition between two species always causes extinction or emigration of one species.b) Two species will stop reproducing until one species leaves the habitat.c) Two species cannot coexist in the same habitat. d) Two species that have exactly the same niche cannot coexist in a community.An extinction vortex describes a) changes in a population’s gene pool that lead to a loss in fitness across time. b) a species ability to adapt to changes in their environment. c) the continuous series of extinctions caused by competition between species. d) a population that has a reduction in fitness because it cannot escape a Hardy-Weinberg Equilibrium.Which of the following methods will provide information to an ecologist about both the size and density of a population? a. mark and recapture b. mark and release c. quadrat d. life table